Abstract: The interaction between young children and environment goes through locomotion. During the process, locomotion gets developed, as well as cognition. It reviews domestic and overseas researches these years, and explains the effects of crawling, grabbing, and gesture to cognition in early child development. It indicates that locomotion, in early child development, is the representation of cognition, and may prompt cognition from simple to complicate, low to high. Children get experiences of movement by crawling, so as to hasten the perception. Furthermore, grabbing and gesture act as the media between young children and environment.

Key words: development of locomotion, development of cognition, crawling, grabbing, gesture